CVE-2017-12617

Impact:
Important
Public Date:
2017-09-21
CWE:
CWE-20
Bugzilla:
1494283: CVE-2017-12617 tomcat: Remote Code Execution bypass for CVE-2017-12615
A vulnerability was discovered in Tomcat where if a servlet context was configured with readonly=false and HTTP PUT requests were allowed, an attacker could upload a JSP file to that context and achieve code execution.

Find out more about CVE-2017-12617 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This flaw affects Tomcat on Red Hat Enterprise Linux only when a specific context is configured with readonly=false. The default configuration has a readonly context, so it is not affected.

CVSS v3 metrics

CVSS3 Base Score 8.1
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat JBoss Web Server 3.1 for RHEL 7 RHSA-2018:0466 2018-03-07
Red Hat JBoss Web Server 3.1 for RHEL 6 RHSA-2018:0466 2018-03-07
Red Hat JBoss Web Server 2.1 RHSA-2017:3114 2017-11-02
Red Hat JBoss Enterprise Web Server 2 for RHEL 7 Server RHSA-2017:3113 2017-11-02
Red Hat JBoss Enterprise Application Platform 6.4 RHSA-2018:0269 2018-02-05
Red Hat JBoss Enterprise Web Server 2 for RHEL 6 Server RHSA-2017:3113 2017-11-02
Red Hat JBoss Enterprise Application Platform 6 for RHEL 5 Server (jbossweb) RHSA-2018:0271 2018-02-05
Red Hat Enterprise Linux 6 (tomcat6) RHSA-2017:3080 2017-10-30
Red Hat JBoss Web Server 3.1 RHSA-2018:0465 2018-03-07
Red Hat JBoss Enterprise Application Platform 6.3 for RHEL 7 Server (jbossweb) RHSA-2018:0268 2018-02-05
Red Hat JBoss Enterprise Application Platform 6 for RHEL 6 Server (jboss-ec2-eap) RHSA-2018:0275 2018-02-05
Red Hat Enterprise Linux 7 (tomcat) RHSA-2017:3081 2017-10-30
Red Hat JBoss Fuse 6.3 RHSA-2018:2939 2018-10-17
Red Hat JBoss Enterprise Application Platform 6 for RHEL 6 Server (jbossweb) RHSA-2018:0270 2018-02-05
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Mitigation

Ensure that readonly is set to true (the default) for the DefaultServlet, WebDAV servlet or application context.

Block HTTP methods that permit resource modification for untrusted users.

External References

Last Modified